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author | Michael Lutz <michi@icosahedron.de> | 2021-01-16 16:43:38 +0100 |
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committer | Michael Lutz <michi@icosahedron.de> | 2021-02-22 22:16:07 +0100 |
commit | 6bcc4884c20a15b0e627f88ad2bca766a8914377 (patch) | |
tree | a9374abeea6f8863fd0c590883af010ce37324e0 /src/video/opengl.h | |
parent | d4dbb3f46ebeded1506af67fcd53dadb4b04f564 (diff) | |
download | openttd-6bcc4884c20a15b0e627f88ad2bca766a8914377.tar.xz |
Add: [OpenGL] Accelerated mouse cursor drawing.
Diffstat (limited to 'src/video/opengl.h')
-rw-r--r-- | src/video/opengl.h | 56 |
1 files changed, 55 insertions, 1 deletions
diff --git a/src/video/opengl.h b/src/video/opengl.h index 59f61db1d..1d7404139 100644 --- a/src/video/opengl.h +++ b/src/video/opengl.h @@ -15,6 +15,8 @@ #include "../core/alloc_type.hpp" #include "../core/geometry_type.hpp" #include "../gfx_type.h" +#include "../spriteloader/spriteloader.hpp" +#include "../misc/lrucache.hpp" typedef void (*OGLProc)(); typedef OGLProc (*GetOGLProcAddressProc)(const char *proc); @@ -22,8 +24,10 @@ typedef OGLProc (*GetOGLProcAddressProc)(const char *proc); bool IsOpenGLVersionAtLeast(byte major, byte minor); const char *FindStringInExtensionList(const char *string, const char *substring); +class OpenGLSprite; + /** Platform-independent back-end class for OpenGL video drivers. */ -class OpenGLBackend : public ZeroedMemoryAllocator { +class OpenGLBackend : public ZeroedMemoryAllocator, SpriteEncoder { private: static OpenGLBackend *instance; ///< Singleton instance pointer. @@ -35,12 +39,22 @@ private: GLuint vbo_quad; ///< Vertex buffer with a fullscreen quad. GLuint pal_texture; ///< Palette lookup texture. + GLuint remap_program; ///< Shader program for blending and rendering a RGBA + remap texture. + GLint remap_sprite_loc; ///< Uniform location for sprite parameters. + GLint remap_screen_loc; ///< Uniform location for screen size; + GLint remap_zoom_loc; ///< Uniform location for sprite zoom; + GLint remap_rgb_loc; ///< Uniform location for RGB mode flag; + + LRUCache<SpriteID, Sprite> cursor_cache; ///< Cache of encoded cursor sprites. + OpenGLBackend(); ~OpenGLBackend(); const char *Init(); bool InitShaders(); + void RenderOglSprite(OpenGLSprite *gl_sprite, uint x, uint y, ZoomLevel zoom); + public: /** Get singleton instance of this class. */ static inline OpenGLBackend *Get() @@ -54,8 +68,48 @@ public: bool Resize(int w, int h, bool force = false); void Paint(); + void DrawMouseCursor(); + void ClearCursorCache(); + void *GetVideoBuffer(); void ReleaseVideoBuffer(const Rect &update_rect); + + /* SpriteEncoder */ + + bool Is32BppSupported() override { return true; } + uint GetSpriteAlignment() override { return 1u << (ZOOM_LVL_COUNT - 1); } + Sprite *Encode(const SpriteLoader::Sprite *sprite, AllocatorProc *allocator) override; +}; + + +/** Class that encapsulates a RGBA texture together with a paletted remap texture. */ +class OpenGLSprite { +private: + /** Enum of all used OpenGL texture objects. */ + enum Texture { + TEX_RGBA, ///< RGBA texture part. + TEX_REMAP, ///< Remap texture part. + NUM_TEX + }; + + Dimension dim; + GLuint tex[NUM_TEX]; ///< The texture objects. + + static GLuint dummy_tex[NUM_TEX]; ///< 1x1 dummy textures to substitute for unused sprite components. + + static bool Create(); + static void Destroy(); + + bool BindTextures(); + +public: + OpenGLSprite(uint width, uint height, uint levels, SpriteColourComponent components); + ~OpenGLSprite(); + + void Update(uint width, uint height, uint level, const SpriteLoader::CommonPixel *data); + Dimension GetSize(ZoomLevel level) const; + + friend class OpenGLBackend; }; #endif /* VIDEO_OPENGL_H */ |